Sectional draw-bar for harrows.



G. H. POUNDER.

SECTIONAL DRAW BAR FOR HARROWS.

APPLICATION FILED IAN.2. 1914.

1 144,503., Patented June 29, 1915.

* 2 SHEETS-SHEET l.

l G. H. POUNDER. SECTIONAL DRAW BAH FOR HARROWS.

pErrEn 'srains ra'rnwr @Enron GEORGE H. POUNDEE, 0E EoE'r ATKINSON,WISCONSIN.

sEc'rroNAL DRAW-EAR Eon HAEBows.

To all whom it may concern:

Be itknown that I, GEORGE H. PoUNDER, a citizen of the United States,and resident of Fort Atkinson, county of Jefferson, and State ofWisconsin, have invented new and useful Improvements in Sectional Draw-Bars for Harrows, of which the following is a description, referencebeing had to the accompanyin drawings, which are a part of this specication.

This invention has for its object to provide draw irons of novelconstruction for connecting the sections of a harrow with the draw barso as to avoid the crowding of the harrow sections byside draft of theend draw irons and to relieve the draw bars of the shock or jerk felt byone section of the harrow passing over an obstruction.

With the above and other objects in view the invention consists in thesectional draw bars for harrows as* herein claimed and all equivalents.4 l

Referring to the accompanying drawing in which like characters ofreference indicate the same parts in the different views, Figure 1 is aperspective View of a harrow provided with a sectional draw bar 5 Fig. 2is a longitudinal sectional view through the abutting ends of draw barsections thereof showing a preferred form of coupling means in positionfor holding the draw bar sections in rigid relation to each other; Fig.3 isl a similar View thereof with the parts in position for allowing alimited vertical flexibility at the draw bar section couplings; Fig. 4is a plan view showing the top members of such coupling means; Fig. 5 isa bottom view showing the bottom members thereof in the condition forgiving iieXibility to the draw bar sections as shown in Fig. 3; Fig. 6is a similar view showing a modied form of the bottom connector; and,Fig. 7 is a longitudinal sectional view thereof; Fig. 8 is a ,plan viewshowing the draw iron for. connecting the harrow sections with thedrawbars; Fig. 9 is a sectional side view thereof.

In these drawings 10A indicates a series of harrow sections connectedtogether in the usual manner to constitute a sectional harrow, the drawbar, to which the'harrow sections are attached, being formed in sections11, all of. which, except the two end sec` tions, are of the same lengthas the harrow section, and the end sections forconvenience being madesomewhat shorter. The draw Specification of Letters Patent.

Patented June 29, 1915.

of hooks 13 at its end, which is also at the end of the draw barsection, said hooks eX- tending upwardly and away from the end of thedraw bar section and adapted to engage a pair of eyes 14 formed in theoverhanging edge of a similar plate 15 bolted on i top of the end of theadjoining draw bar section. The overhanging edge of plate 15 continuesto the front and rear ofthe draw bar to form eyes 16 in which the bailrods 17 and the draw irons 18 respectively enage.

Of the bolts which fasten the plates 12 and 15 in place there is onebolt 19 for each plate which is countersunk on the bottom of the drawbar section and another bolt for each plate which forms a hook with itsend let into a recess on the bottom of the dra-w bar section, the hookbolt for plate 12 being designated by the numeral 20 and the hook boltfor plate 15 being designated by the numeral 21. The hook bolt 2O clampsa hinge plate 22 to the bottom of the draw bar section and its companionhinge plate 23 has a pivotal oonnection therewith with longitudinal playpermitted by the pivot pin 24 of pivot plate 22 riding in an elongatedloop 25 of the hinge plate 23. The hook bolt 21 in entering its recessin the bottom of the draw bar section locks the pivot plate 23 in aposition where it is drawn tightly against the pivot bolt 24 so as topermit no play in the joint of the two draw bar sections. This hook boltpasses through a slot 26 in the hinge plate 23 and in this rigidconnection reaches beyond the slot and passes through an opening 27 inthe hinge plate 23 in order to tit within its recess in the bottom ofthe draw bar section. When it is desired to allow for Hexibility in thejoint between the draw bar sections it is only necessary to loosen thehook bolt 21 and turn it a half turn so that its hook end lies withinthe slot 26 as well as its stem portion and as the hinge plate 23 wouldthen be free to swing downwardly to the position shown in dotted linesin Fig 2 a latch member 28, which is pivotally mounted on the hingeplate 23, is swung to the position shown in Fig. 5 where its projectingtongue 29 passes through the hook bend of hook bolt 21 and thus servesto lock the sition in which it lies wholly within the slot 26 Aand withthe latch 28 in its open position, as shown by dotted lines in Fig. 5,so that the hinge plate 23 is free from connection with its draw barsection and then by swinging one draw bar section with relation to theother the hooks 13 may be withdrawn' from the eyes 14. During shipmentit is desirable to have the hinge plates 22 and 23 withdrawn from theirnormal position to a position where they will lie flat against the drawbar section to which the hinge plate 22 is connected and this isaccomplished rby loosening hookbolt 20 and giving it and the hingeplates a half turn thereon to-the position shown in dotted lines in Fig.5. L

In the modified form of the invention shown in Figs. 6` and 7 the hingeplates are dispensed with and a single locking plate 30 is substitutedtherefor. The top plates 12 and 15 are retained, but their clampingbolts are all of a somewhat dilferent construction, being threaded onboth ends. The bolt 31 which is nearest the end of one draw bar sectionpasses through a pivotal opening in the locking plate 3) and has a nutthreaded on each end thereof, and the other bolt 32 on that end of thedraw bar section carries a shoulder or a nut countersunk in the bottomof the draw bar section,` besides having the nuts on its ends, and thelocking plate has a pair of notchesA 33 and 34 to receive said bolt ineither'` of thev two positionsin which the locking plate 30 may beplaced by swinging it on the pivot bolt 31 and in either of thesepositions it may be locked by tightening the nut on the lower end ofbolt 32.

The two bolts 35 which clamp the plate 15 in place are likewise providedwith shoulders or nuts countersunk in the bottom of the draw barsection, in addition to the nuts on their ends, and the rocking plate 30has a pair of notches 36 to engage therewith when it is extended to itslocking position as shown in full lines .in Fig. 6. Slightly raisedshoulders or lugs 37 are preferably formed at the edges of slots 33 and36 to prevent accidental swinging of the locking' plate which woulddisengage it from the bolts. Vith this form of connection no flexibilityis provided for in the joint between the draw bar sections, but they arerigidly held together by the locking plate 30, though they may bereadily disengaged by swinging thelocking plate to the posi-v tween themis such that the entire drawbar W is madeas rigid as if made in onepiece with the capability of being made flexible to permit of verticalmovement only of the dra-w bar sections when desired. It is obvious thata harrow of this construction may be enlarged .or made smaller by addingor subtracting a section of' the draw bar with itsharrow section. Y,

The draw irons 18 areshown in detail in Figs.` 8v and 9 in the form of acasting provding aloop 38 at tsfront" end engaged by a hook 3,9` whichenters one ofthe eyes 1G of the draw bar connection. Ateach side thedraw iron 18 has a depressedl groove 4() leading from anL opening `41near a shoulder. at the front end to a flaring guide arch 42 at the rearend and a double hook 43 passes beneath the arch/42 and lies within thegroove 40 with one hooked end engaged through the opening 41, while itsrear hooked end engages thel end connection 44 of the front harrowsection 10 of one gang of harrow sections. The hook member 43 is freetohave a limited vertical swinging movementwith relationV to the draw ironso that the harrow sections may move independently of eachother inpassing over irregular surfaces, but' the guide arches 442- prevent alateral freedom of'movement of the hook members. This constructionavoids A the crowding of harrow sections causedA by side draft of theend draw irons and relieves the drawbar ofthe shock orjerk f elt by onesection of harrow passing over an obstruction by distributing the shockto the adjoining sections of the harrow which would not ordinarily `bethe case.

What I claim as new and desire to secure by Letters Patent is:

1. In a harrow, a draw iron having a loop for connection with the drawbar and provided with openings and guide arches, hook members lengagingthe openings and confined by the guide arches so asto permit freedom ofvertical movement and prevent lateral movement thereof, said hookmem-Abers being` adapted for connection with the ends of` different harrowsections.

2. In a harrow, a draw iron forming a loop for connection with the drawbar and having an opening at each side thereof with a depressed grooveextending rearwardly to In testimony whereof, I aix my signaa guidearch, said groove and guide arch ture, in presence of two witnesses.

forming a Haring guide way, and hook members engaging the openings andlying wth- GEORGE H POUNDER' 5 in the flaring guide way to have a freever- Witnesses:

tical swinging movement without lateral GEO. ERNEST WARD,

play. LLOYD R. DONKLE.

Copies of this patent maybe obtained for ve cents each, by addressingthe Commissioner oi Patents,

. Washington, D. G.

